The Dark Lord, Sauron

When Sauron enters the battlefield create artifact
The One Ring.
Sauron may be attacked directly. He can't attack,
block or be buffed. If Sauron would take damage
you may prevent any or all of it and spread it
amongst creatures in your control.
If Sauron's on the battlefield during your endstep
you may place a +1/+1 token on all other Red and
Black creatures you control. If Sauron leaves the battlefield, all creatures with these tokens on lose
them and take 2 damage.